Date: Fri, 7 Apr 1995 01:42:08 -0700 (PDT) From: Terry Lee <terryl@CS.Stanford.EDU> To: "Justin T. Gibbs" <gibbs@estienne.CS.Berkeley.EDU> Cc: freebsd-hackers@FreeBSD.org Subject: Re: AHA-2940 boot prob. 950322-SNAP Message-ID: <Pine.SUN.3.91.950407013447.14857B-100000@Xenon.Stanford.EDU> In-Reply-To: <199504061930.MAA24679@estienne.cs.berkeley.edu>
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> I think this should fix it for you. If for some reason your drive times
> out (and is detected as a tagged queuing device), try disabling the
> tagged queuing support. Its just a couple #if 0's in i386/scsi/aic7xxx.c's
> ahc_done routine where it looks at the inquiry data to see if the drive
> can do tagged queueing.
Yes, my drive was detected with tagged queuing and could not mount root.
So I made the following modification and it seems to work okay. Just
commented out one if line and replaced it with if(0)
xs->flags |= ITSDONE;
if(xs->cmd->opcode == 0x12 && xs->error == XS_NOERROR)
{
struct ahc_data *ahc = ahcdata[unit];
struct scsi_inquiry_data *inq_data;
u_short mask = 0x01 << (xs->sc_link->target |
(scb->target_channel_lun & 0x08));
/*
* Sneak a look at the results of the SCSI Inquiry
* command and see if we can do Tagged queing. This
* should really be done by the higher level drivers.
*/
inq_data = (struct scsi_inquiry_data *)xs->data;
/*if(((inq_data->device & SID_TYPE) == 0)
* && (inq_data->flags & SID_CmdQue)
* && !(ahc->tagenable & mask))
*/
if(0)
{
/*
* Disk type device and can tag
*/
printf("ahc%d: target %d Tagged Queuing Device\n",
unit, xs->sc_link->target);
ahc->tagenable |= mask;
#ifdef QUEUE_FULL_SUPPORTED
xs->sc_link->opennings += 2; */
#endif
}
}
ahc_free_scb(unit, scb, xs->flags);
Can you let me know if there is anythign else to watch out for?
Thanks, Justin.
BTW, I'm using a Seagate ST-31200N.
Best regards,
Terry
I N T E R N E T Terry Lee, Technical Director
D E S I G N 745 Stanford Avenue, Palo Alto, California 94306
G R O U P 415 424 0747 voice 415 424-0751 fax
http://www.mall.net terryl@cs.stanford.edu http://www.mall.net/terry
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